org.bytedeco.arrow_dataset

Class ExpressionResult

java.lang.Object

org.bytedeco.javacpp.Pointer

org.bytedeco.arrow_dataset.ExpressionResult

All Implemented Interfaces:

AutoCloseable

@Name(value="arrow::Result<std::shared_ptr<arrow::dataset::Expression> >")
 @NoOffset
 @Properties(inherit=arrow_dataset.class)
public class ExpressionResult
extends Pointer

Nested Class Summary

Nested classes/interfaces inherited from class org.bytedeco.javacpp.Pointer

Pointer.CustomDeallocator, Pointer.Deallocator, Pointer.NativeDeallocator, Pointer.ReferenceCounter

Field Summary

Fields inherited from class org.bytedeco.javacpp.Pointer

address, capacity, limit, position

Constructor Summary

Constructors

Constructor and Description
ExpressionResult() Constructs a Result object that contains a non-OK status.
ExpressionResult(Expression value) Constructs a Result object that contains value.
ExpressionResult(ExpressionResult other) Copy constructor.
ExpressionResult(long size) Native array allocator.
ExpressionResult(Pointer p) Pointer cast constructor.
ExpressionResult(Status status) Constructs a Result object with the given non-OK Status object.

Method Summary

Modifier and Type	Method and Description
boolean	Equals(ExpressionResult other) Compare to another Result.
ExpressionResult	getPointer(long i)
Expression	MoveValueUnsafe()
Expression	multiply()
boolean	ok() Indicates whether the object contains a T value.
ExpressionResult	position(long position)
ExpressionResult	put(ExpressionResult other) Copy-assignment operator.
Status	status() Gets the stored status object, or an OK status if a T value is stored.
Expression	ValueOrDie() Gets a mutable reference to the stored T value.
Expression	ValueUnsafe() Apply a function to the internally stored value to produce a new result or propagate the stored error.

Methods inherited from class org.bytedeco.javacpp.Pointer

address, asBuffer, asByteBuffer, availablePhysicalBytes, calloc, capacity, capacity, close, deallocate, deallocate, deallocateReferences, deallocator, deallocator, equals, fill, formatBytes, free, getPointer, getPointer, getPointer, hashCode, isNull, isNull, limit, limit, malloc, maxBytes, maxPhysicalBytes, memchr, memcmp, memcpy, memmove, memset, offsetof, offsetof, parseBytes, physicalBytes, position, put, realloc, referenceCount, releaseReference, retainReference, setNull, sizeof, sizeof, toString, totalBytes, totalCount, totalPhysicalBytes, withDeallocator, zero

Methods inherited from class java.lang.Object

clone, finalize, getClass, notify, notifyAll, wait, wait, wait

Constructor Detail

ExpressionResult

public ExpressionResult(Pointer p)

Pointer cast constructor. Invokes Pointer.Pointer(Pointer).

ExpressionResult

public ExpressionResult(long size)

Native array allocator. Access with Pointer.position(long).

ExpressionResult

public ExpressionResult()

Constructs a Result object that contains a non-OK status. This constructor is marked explicit to prevent attempts to return {} from a function with a return type of, for example, Result<std::vector<int>>. While return {} seems like it would return an empty vector, it will actually invoke the default constructor of Result.

ExpressionResult

public ExpressionResult(@Const @ByRef
                        Status status)

Constructs a Result object with the given non-OK Status object. All calls to ValueOrDie() on this object will abort. The given status must not be an OK status, otherwise this constructor will abort. This constructor is not declared explicit so that a function with a return type of Result<T> can return a Status object, and the status will be implicitly converted to the appropriate return type as a matter of convenience.

Parameters:

status - The non-OK Status object to initialize to.

ExpressionResult

public ExpressionResult(@SharedPtr @ByVal
                        Expression value)

Constructs a Result object that contains value. The resulting object is considered to have an OK status. The wrapped element can be accessed with ValueOrDie(). This constructor is made implicit so that a function with a return type of Result<T> can return an object of type T, implicitly converting it to a Result<T> object.

Parameters:

value - The value to initialize to.

ExpressionResult

public ExpressionResult(@Const @ByRef
                        ExpressionResult other)

Copy constructor. This constructor needs to be explicitly defined because the presence of the move-assignment operator deletes the default copy constructor. In such a scenario, since the deleted copy constructor has stricter binding rules than the templated copy constructor, the templated constructor cannot act as a copy constructor, and any attempt to copy-construct a Result object results in a compilation error.

Parameters:

other - The value to copy from.

Method Detail

position

public ExpressionResult position(long position)

Overrides:

position in class Pointer

getPointer

public ExpressionResult getPointer(long i)

Overrides:

getPointer in class Pointer

put

@ByRef
 @Name(value="operator =")
public ExpressionResult put(@Const @ByRef
                                                                ExpressionResult other)

Copy-assignment operator.

Parameters:

other - The Result object to copy.

Equals

@Cast(value="bool")
public boolean Equals(@Const @ByRef
                                           ExpressionResult other)

Compare to another Result.

ok

@Cast(value="bool")
public boolean ok()

Indicates whether the object contains a T value. Generally instead of accessing this directly you will want to use ASSIGN_OR_RAISE defined below.

Returns:

True if this Result object's status is OK (i.e. a call to ok() returns true). If this function returns true, then it is safe to access the wrapped element through a call to ValueOrDie().

status

@Const
 @ByRef
public Status status()

Gets the stored status object, or an OK status if a T value is stored. /** /** @return The stored non-OK status object, or an OK status if this object /** has a value.

ValueOrDie

@SharedPtr
 @ByRef
public Expression ValueOrDie()

Gets a mutable reference to the stored T value. This method should only be called if this Result object's status is OK (i.e. a call to ok() returns true), otherwise this call will abort.

Returns:

The stored T value.

multiply

@SharedPtr
 @ByRef
 @Name(value="operator *")
public Expression multiply()

ValueUnsafe

@SharedPtr
 @ByRef
public Expression ValueUnsafe()

Apply a function to the internally stored value to produce a new result or propagate the stored error.

MoveValueUnsafe

@SharedPtr
 @ByVal
public Expression MoveValueUnsafe()